So at this moment, you feel lonely, dejected, and I'm sure you feel like there's no one in the world right now.
Wait. DO NOT DATE YET. I made this mistake of going out to dinner with a girl... and the entire time, I kept comparing her to my ex (in my head)... wasn't a pleasant experience really.
They say give roughly 1 month for every year you've been together if you've dated for less than 5 years... and 2 months for every year you've been together if more than 5 years. Of course, this differs from person to person.
For me, it's been 4 weeks since the breakup and 3 weeks since last contact. I'm going to just... give myself time. And chill. Who knows, maybe I won't date for another 6 months... the point is, I don't care. I'm not looking to date again anytime soon. I have fun chilling with my friends, playing with my dog, and just doing my hobbies (this website, work, going to the gym, playing pool (just picked this up btw))
Take your time. When you're ready, women will come sniffing around as you'll look like a guy who's ready.